Which of the following oral controlled release system is shown in the picture?(a) Oral osmotic pump(b) Reservoir device(c) Hydrodynamic pressure controlled system(d) Altered density systemsI had been asked this question in homework.I'd like to ask this question from Biopharmaceuticals in division Biopharmaceuticals of Drug Biotechnology

Which of the following oral controlled release system is shown in the

1.	Which of the following oral controlled release system is shown in the picture?(a) Oral osmotic pump(b) Reservoir device(c) Hydrodynamic pressure controlled system(d) Altered density systemsI had been asked this question in homework.I'd like to ask this question from Biopharmaceuticals in division Biopharmaceuticals of Drug Biotechnology
Answer» The correct CHOICE is (b) Reservoir device The explanation: Reservoir devices are hollow containing an INNER core of drug which will be SURROUNDED in a water insoluble polymer membrane. The polymer can be applied by coating or microencapsulation techniques. The drug release mechanism across the membrane involves its partitioning into the membrane with subsequent release INT o the surrounding fluid by DIFFUSION.

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